Sup guys, new to the forums but I'm just looking for a solid opening Pokemon to start with that can set up fast and take a solid amount of hits before going down. I was thinking possibly a Ferrothorn, or an Umbreon build, could you help me out?

Shunckle: best defence/ and a complete killer glass cannon if played on offencive

DEFENSIVE
-rest(chesto berry)
-stealth rock: really hurts fire/ flying and bug pkmn that switch in
- safe guard:support team so no status issues
-struggle bug: useless to have bugbite as shuckles attack sucks, struggle bug is just to make their special attackers useless.

OFFENCE
-power trick: for god sake us this risky set after trick room or it will fail.
-bugbite/rock slide/ stone edge
-rest
-stealth rock

Cloyster (jolly)--focus sash-- forgets its crap sp def, its a great physical wall and sweeper
-rock blast<breed with corsola-make sure it has rock blast too.
-icicle spear: make sure your cloyster has skill link the ability- its beasty.
-shell smash: should always be the first move used and focus sash helps you do dat.
-razor shell